reactjs - mixReducers 导致代码中断

Question

这是我发布的帖子 here 的后续内容

经过大量故障排除后，我发现这段代码可以正常工作

import React from 'react';
import { createStore, combineReducers, applyMiddleware } from 'redux';
import createLogger from 'redux-logger';
import thunkMiddleware from 'redux-thunk';
import { Provider } from 'react-redux';
import DataTableReducer from './reducers/DataTableReducer';
import DimensionPickerReducer from './reducers/DimensionPickerReducer';

const loggerMiddleware = createLogger();
const store = createStore(
    DimensionPickerReducer, 
    applyMiddleware(
        thunkMiddleware, 
        loggerMiddleware
    )
);

export default store;

但是如果我用像这样的组合 reducer 调用替换我的单个 reducer

import React from 'react';
import { createStore, combineReducers, applyMiddleware } from 'redux';
import createLogger from 'redux-logger';
import thunkMiddleware from 'redux-thunk';
import { Provider } from 'react-redux';
import DataTableReducer from './reducers/DataTableReducer';
import DimensionPickerReducer from './reducers/DimensionPickerReducer';

const loggerMiddleware = createLogger();
const store = createStore(
    combineReducers({
        DataTableReducer,
        DimensionPickerReducer
    }), 
    applyMiddleware(
        thunkMiddleware, 
        loggerMiddleware
    )
);

export default store;

我立即开始通过 DimensionPicker 控件收到错误，指出未指定强制属性。

因此，combineReducer 方法对我不起作用。

我在这里上传了一个示例项目，它显示了问题。

https://github.com/abhitechdojo/MovieLensReact

完成 git 克隆后，您必须运行 npm install

Answer 1

使用组合式 reducer ，您的商店将具有如下数据结构:

{
    DimensionPickerReducer: {
        dimenisionName: '',
        pickerIsLoading: false,
        pickerError: '',
        currentAttribute: '',
        attributeList: []
    },
    DataTableReducer: {
        tableData: [],
        tableIsLoading:false,
        tableError: ''
    }
}

因此，您应该调整容器以与组合商店一起使用。例如，在 DimensionPickerContainer.js 中，您应该更改 mapStateToProps 函数:

const mapStateToProps = (state) => {
    return {
        attributeList : state.DimensionPickerReducer.attributeList,
        currentAttribute : state.DimensionPickerReducer.currentAttribute
    }
}

你还可以在store中命名你的reduce，这样它们在数据结构中就不会看起来难看。例如。 combineReducers({DimensionPicker: DimensionPickerReducer, dataTable: DataTableReducer})